DOUBLE LAYERS MANHOLD COVER
Can according to your request to increase the weight
Have high against compression, bending, impact and also toughness, good at appearance, anti-theft and with a lock structure, to achieve the well property theft. With the acid and alkali corrosion, wear and vehicle rolling resistance, long service life.
Use non-toxic water-solubility black paint
Widely used in municipal, water conservancy, electricity, highways. etc.